.. _contact_center_conditions_and_restrictions:

Conditions / Restrictions: Overview
-----------------------------------

* Only one instance of Contact Center Server can be created for a Cisco Unified
  Communications Manager cluster.
* Only one instance of Contact Center Service can be created for Contact Center
  Server.
* For CUSP, only one trunk of type CUSP needs to be added in
  **Services > Contact Center > Servers**.

* For deleting a server, please make sure the service is deleted first.

.. note::

   References to HCM-F and Shared Data Repository (SDR) are only relevant if
   installed.

   Ensure that before you begin deleting Contact Center Server you have
   deleted all the agent lines for that Contact Center Server.

* The monitoring application PCA is added through HCM-F only for monitoring the
  Contact Center components. But, for other components such as CUCM,
  IM and Presence, and Unity Connection, PCA is added (selected) through VOSS-4-UC.